'''''Yén''''' (plural '''''yéni'''''<ref>{{RGEO|Namarie}}, line 2</ref>) is [[Quenya]] for "long year" or "great year",<ref name=PE17>{{PE|17}}, p. 62 (forms ''yén'', ''yéni'', and ''yēn'')</ref> and was a unit of time used by the [[Elves]] of [[Middle-earth]] before the first rising of the [[Sun]]. Compare with a [[Valian Years|Valian Year]], the unit of time used in [[Valinor]].

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'''''Yén''''' (plural '''''yéni'''''<ref>{{RGEO|Namarie}}, line 2</ref>) is [[Quenya]] for "long year" or "great year",<ref name=PE17>{{PE|17}}, p. 62 (forms ''yén'', ''yéni'', and ''yēn'')</ref> and was a unit of time used by the [[Elves]] of [[Middle-earth]] after the first rising of the [[Sun]]. Compare with a [[Valian Years|Valian Year]], the unit of time used in [[Valinor]].

Tolkien used Valian Years to measure the passing of time in the Elder Days as recorded in the Annals of Aman, but such a Valian Years equals 9.582 solar years = 3500 days (in older versions, the Annals of Valinor, it equals 10 solar years).